we know that zero times infinity is undefined(indeterminate form), but what about this : the slope of x axis = 0, and the slope of y axis is tan90 which is infinity '∞'

so, m1.m2= -1 , 0*∞= -1

we know that zero times infinity is undefined(indeterminate form), but what about this : the slope of x axis = 0, and the slope of y axis is tan90 which is infinity '∞'

so, m1.m2= -1 , 0*∞= -1

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TopNewestU can apply m1. M2 =-1....only when slopes of the 2 lines are defined... – Poonayu Sharma · 3 years, 1 month ago

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